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May be, reading the Part 2 of Arduino TFT Touch Screen matter will help you. The touch screen shield I got has ST7789V (0x7789), which is somewhat uncommon. This article is Part 2 of Arduino TFT Touch Screen Calculator By MCUFRIEND. These cheap China used-display stuffs basically have some risk of purchasing. If the driver is rare, you do not have much options. Identifying driver not also that easy. We feel that these web pages will help you :
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misc.ws/2015/01/24/lcd-touch-screen-information/ http://www.rinkydinkelectronics.com/p_utft_analog_clock.php https://docs.google.com/spreadsheets/d/11NiqGfhY6hEn82NVkdbyhqLUGae0Sy1m_vwhqrpiItQ/edit#gid=1863870689 |
Arduino TFT Touch Screen Calculator (MCUFRIEND)
If you notice my model of touch screen :
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You’ll notice that it has no commonly seen Home, Message etc icons printed over the lower part. May be the thing was used by Samsung or LG for their mobile. If you dislike to read so much, here is code for you to test :
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#define PORTRAIT 0 #define LANDSCAPE 1 #define TOUCH_ORIENTATION PORTRAIT #include <Adafruit_GFX.h> // Core graphics library #include <MCUFRIEND_kbv.h> MCUFRIEND_kbv tft; // hard-wired for UNO shields anyway. #include <TouchScreen.h> #define BLACK 0x0000 #define BLUE 0x001F #define RED 0xF800 #define GREEN 0x07E0 #define CYAN 0x07FF #define MAGENTA 0xF81F #define YELLOW 0xFFE0 #define WHITE 0xFFFF #define BUTTON_X 30 #define BUTTON_Y 123 #define BUTTON_W 51 #define BUTTON_H 50 #define BUTTON_SPACING_X 07 #define BUTTON_SPACING_Y 07 #define BUTTON_TEXTSIZE 2 char buttonlabels[16][5] = { "1", "2", "3","+", "4", "5", "6","-", "7", "8", "9","/","=","0","DEL","x"}; uint16_t buttoncolors[16] = { BLUE,BLUE,BLUE,GREEN,BLUE,BLUE,BLUE,GREEN,BLUE,BLUE,BLUE,GREEN,GREEN,BLUE,RED,BLUE }; Adafruit_GFX_Button buttons[16]; int col=0,row=0,z=0; #define TEXT_X 5 #define TEXT_Y 25 #define TEXT_W (tft.width()-10) #define TEXT_H 70 #define TEXT_TSIZE 3 #define TEXT_TCOLOR BLACK char q; const int XP=7,XM=A1,YP=A2,YM=6; //240x320 ID=0x7789 const int TS_LEFT=337,TS_RT=653,TS_TOP=797,TS_BOT=495; // Calibrate values #define TS_MINX 125 #define TS_MINY 85 #define TS_MAXX 800 #define TS_MAXY 905 uint32_t num1,num2; char operator_type=-1; #define TEXT_LEN 10 char textfield[TEXT_LEN+1] = ""; uint8_t textfield_i=0; uint32_t result=0; #define MINPRESSURE 400 #define MAXPRESSURE 800 TouchScreen ts = TouchScreen(XP, YP, XM, YM, 350); TSPoint tp; boolean n=false; char test=0; uint16_t identifier; void setup() { // put your setup code here, to run once: Serial.begin(9600); tft.reset(); identifier = tft.readID(); tft.begin(identifier); tft.fillScreen(WHITE); tft.setRotation(0); start_screen(); } void loop() { get_button(); if(q> 0 && q<=16) { q--; if(get_number(q)!=-1) { test++; if(test==1) { num1=get_number(q); pressed_button(); animate(); display_text(); } else if(test==2 && operator_type!=-1){ num2=get_number(q); pressed_button(); animate(); display_text(); test=0; } } else if(get_opertator(q)!=-1) { operator_type=get_opertator(q); pressed_button(); animate(); display_text(); }else if(q==12) {display_text(); switch (operator_type) { case 0:result=num1+num2;break; case 1:result=num1-num2;break; case 2:result=num1/num2;break; case 3:result=num1*num2;break; } result_display(); operator_type=-1; test=0; num1=0; num2=0; char textfield[TEXT_LEN+1] = ""; textfield_i=0; n=true; } else if(q==14 && test!=0) { clr_button(); test--; animate(); display_text(); } q=0; } } void get_button() {for (uint8_t b=0; b<16; b++) { if (buttons[b].contains(tp.x, tp.y)) { buttons[b].press(true); // tell the button it is pressed q=b+1; } else { buttons[b].press(false); // tell the button it is NOT pressed } } } void animate() { if (buttons[q].justPressed()) { buttons[q].drawButton(true); // draw invert! delay(10); buttons[q].drawButton(); } } void clr_button() { textfield[textfield_i] = 0; if (textfield > 0) { textfield_i--; textfield[textfield_i] = ' '; } } int get_number(unsigned int num) { switch (num) { case 0x00: return 1; break; case 0x01: return 2; break; case 0x02: return 3; break; case 0x04: return 4; break; case 0x05: return 5; break; case 0x06: return 6; break; case 0x08: return 7; break; case 0x09: return 8; break; case 0x0A: return 9; break; case 0x0D: return 0; break; default: return -1;break; } } int get_opertator(const char num) { switch (num) { case 0x03: return 0;break; case 0x07: return 1;break; case 0x0B: return 2;break; case 0x0F: return 3;break; default: return -1;break; } } void display_text() { tft.setCursor(TEXT_X + 2, TEXT_Y+10); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print(textfield); } void clear_result() { tft.setCursor(TEXT_X + 2, TEXT_Y+40); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print(" "); tft.setCursor(TEXT_X + 2, TEXT_Y+10); tft.print(" "); n=false; } void result_display() { tft.setCursor(TEXT_X + 2, TEXT_Y+40); tft.setTextColor(TEXT_TCOLOR, WHITE); tft.setTextSize(TEXT_TSIZE); tft.print('='); tft.print(result); } void pressed_button() { textfield[textfield_i] = buttonlabels[q][0]; textfield_i++; textfield[textfield_i] = 0; // zero terminate } void button_ini() { for(int i=0;i<4;i++) { for(int j=0;j<4;j++) creat_button(i,j); } } //function to creat buttons void creat_button(int x,int y) {row=x;col=y; buttons[z].initButton(&tft, BUTTON_X+col*(BUTTON_W+BUTTON_SPACING_X), BUTTON_Y+row*(BUTTON_H+BUTTON_SPACING_Y), // x, y, w, h, outline, fill, text BUTTON_W, BUTTON_H, BLACK, buttoncolors[z],BLACK, buttonlabels[z], BUTTON_TEXTSIZE); buttons[z].drawButton(); z++; } void start_screen() { tft.fillScreen(WHITE); tft.setCursor ((tft.width()/2)-60, 5); tft.setTextSize (2); tft.setTextColor(BLACK); tft.println("CALCULATOR"); tft.drawRoundRect(TEXT_X, TEXT_Y, TEXT_W, TEXT_H, 10, BLACK); button_ini(); waitfortouch(); } void drawBorder () {// Draw a border uint16_t width = tft.width() - 1; uint16_t height = tft.height() - 1; uint8_t border = 10; tft.fillScreen(RED); tft.fillRect(border, border, (width - border * 2), (height - border * 2), WHITE); } TSPoint waitfortouch() { do { tp= ts.getPoint(); pinMode(XM, OUTPUT); //Pins configures again for TFT control pinMode(YP, OUTPUT); } while((tp.z < MINPRESSURE )|| (tp.z > MAXPRESSURE)); tp.x = map(tp.x, TS_MINX, TS_MAXX, 0, tft.width()); tp.y = map(tp.y, TS_MINY, TS_MAXY, 0, tft.height()); return tp; } |
For practical purpose, the above code is also available on GitHub as project. The origin of the above thing is from :
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https://github.com/shubhamtrivedi95/Calculator-using-arduino/blob/master/calculator/calculator.ino |
We also kept the serial text outputs out of various codes :
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https://github.com/AbhishekGhosh/MCUFRIEND-ST7789V-TFT-Calculator/blob/master/ST7789V.txt |
There is no actually not many more things to write. May be there will be another part in future?
Tagged With arduino touch screen projects , arduino tft touch shield , arduino calculator , Arduino calc tft , arduino touch screen display , arduino touch screen 7 , 7 tft touch screen , arduino calculator touch , tft touch screen display , arduino mcufriend msglin
About Abhishek Ghosh
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